CVE-2024-26686

CVE-2024-26686: vulnerability in Linux

fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats

Published · Updated

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call do_task_stat() at the same time and the process has NR_THREADS, it will spin with irqs disabled O(NR_CPUS * NR_THREADS) time. Change do_task_stat() to use sig->stats_lock to gather the statistics outside of ->siglock protected section, in the likely case this code will run lockless.
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6https://git.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4dhttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html